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H. K. SMITH.

LATHE REST.

No. 60,950. Y. Patented Jan. l, 1867.

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HENRY K. SMITH, 0F N ORWICH, CONNECTICUT, ASSIGNOR TO HIMSELF AND CHARLES OSGOOD, CF THE SAME PLACE.

Letters Petentlio. 60,950, dated January 1, 1867.

IMPROVEMENT LATE-RESTS.

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TO .ALL WHOM IT MAY CONCERN:

Be it known that I, HENRY K. SMITH, of Norwich, in the county of New London, and State of Connecticut,-

have invented a new and useful Improvement in Rests for Turning-Lathes; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to vmake and use the same, reference being had to the accompanying drawings, forming'part 'of this specification, in which- Figure 1 is a plan 'or top view of the lathe-rest, showing the rails 'upon which it moves or slides in red.

Figure 2, a central transverse vertical section through the rest and the bed-piece of the lathe upon which it nieves, with the latter in red. n

Figure 3, a vertical section taken in the plane of the linexsc, iig..1,'which section line extends in the direction of the width of thc rest.

Figure 4, a horizontal section taken in the plane of the line y y, iig. 3.

Figure 5, an elevation of the inner end of the rest with its upper portion in vertical sectionr Figures 6 and 7, detail views.

Similar letters of reference indicate like parts.

The present invention consists, rst, in a novel arrangement of gearing whereby the movement of the rest can be changed in direction at pleasure, that is, made to move either toward the right or left on the lathegand,

second, in a novel manner of constructing the rest whereby it can be raised andlowered according as may he desired. I I

A in'the drawings represents the framework of the rest, consisting of a. box-portion, B, tothe top or upper side of which is secured a T-shaped frame, C, extending in a horizontal plane therefrom andl in a. directionat right angles thereto. rThis box-portion B comes upon the front side of the lathe, when the rest framework, by its T-shaped frame C, is laid or placed upon the parallel pright bars or rails, D, of the lathe-bed, u-'s plainly shown in the drawings, iig. 2.`v E,.a pinion-wheel at one end of a hollowl sleevefor shaft F, arranged-"toturn Aupon a xed centre horizontal shaft of the front plate, J, of the box-portionlB, which pinon-wheel is in proper position for engaging with the toothed rack-bar kupon the under side of the Hauch L, atthe-upper end of 'the front rail or bur, D, of the lathefbed, this rack-bar 7c in the drawings being shown in red. To this hollow shaft F, hereinabove referred to, a gear-wheel, N, is secured, with whichinterloqksor meshes a pinion-wheel, O, secured to' the inner end of a spindle, P, that, projecting beyond the front plate J ofv the box B, has a handle, Q, there secured to it for convenience 'in turning it. This gear-wheel upon one side inter-locks or meshes with a gearwheel, R, which is one of a series of' gears, R, S, and T,'constituting or forming a part ofthe friction-clutch U. The construction and arrangement of the various parts composing thel clutchU are the same as that described in the schedule annexed to the Letters Patent 'granted to me on the 5th day of`December,;A. D. 1865, and therefore needs no particular description herein, the gears R and T being the loose gears of the clutch, which, by' .thescrewing in or out of the centreconieal-shaped spindle, V, thereof, are thrown' into or out of connection with the other or intermediate gear S. With the centre gear S of the clutch U a gear-wheel, W, engages, forming a connection between such clutchnd the centre gear-wheel, Y, of another clutch, X, of a similar const-ruction and arrangement of parts. With each ofthe outside or loose gear-wheels Z Z of the clutchV X similarvworm'- gears, A?, are engaged, both of which are-hung and turn in suitable bearings of the front plate of the box upon its inside, and are interlocked or connected together through a similar pinion-wheel Blof each worm-gear.- Through one of the worm-gears', A, a shaft, C, extends, that, in the direction of its length, is grooved, and by a key-pin upon the inside of the worm-gear isconnectedwith the same,so that' as'the'saidshaft is revolved the said worm-gear A2 will be revolved with it, while at the same time tlie'rsaid'lgear A? can freely slide forward and backward upon the same. The friction-clutchX hereinabove referred to is'operated by turning its centre conicalshaped spindle, having a milled head Dz, in theproper direction tozthrow either one or the other of the loose gears,`Z, of such clutch into connection with its centre'gear-wheel, Y." /The shaft C3 is connected with theA running gearing or driving power of the lathe, and by its revolution, according as either one or the other of the loose and outside gearwheels,-Z, of the frictiomclutch X is.-in connection with the centre g/oamvhecbY of the same, (with the connection through the loose gear-wheel R of the dlutch U and gearnrheehN establishcfh) thc cow, 2

lathe-rest will be made to travel either toward thc right or left upon the lathe-bed, as the crise may be, and at my time may be changed by properly operating the spindle of the clutch X to throw either oneor the other of the loose gear-wheels Z oi' the clutch X into connect-ion with the centrewheel Y of such clutch, as is obvious without any further explanation. To the upper side of the T-shnpcd frame C a frame, A3, corresponding in general shape to that of the frame C, is arranged, as will be now described. This frame is made in two parts or sections, C3 and D3, placed one upon the other, with the upper, C, hung' to the lower at its front end, as .shown at i33 in the drawings, and the' lower one, D, arranged iso-slide upon dove-tail tenen strips, F3, of the 'upper side of the frame C. In the upper side of the upper section of the frame', A3, a right-angular -r-shapedv way or groove G is made, in which is to be arranged the tool-rest of the lathe. Hf, a thumb-screw, screwing -into and through a.-nut,I3, divided into two equal parts or sections in 'one direction, and in the other direction suspended upon centre screws, J3, screwed into the tail portion of the upper section of the frame B3 from each 'side of the same. The lower end, Kfof the thumb-screw is formedoi' a doubletruncated conical shape, 'with 'the smaller bases' together, and turns by such ond loosely in a nut, I", divided and hung to the lcwersection, D2'

of the frame B3 in a similar manner to .thatabove explained for the nut I. By means of the thumb-screw H3, 'in connection with the nuts Is and L3, it' is plain to be seen that the upper section, G5', of the frame Bacan be .more or less inclined with regard to the lower section, D, according as may be found necessary inA the use of the ,tool-rest to present the tool to its work, the dividing of the nuts and the swivelling of them in the 'frame A3, as hereinabove described, obviating all strain upon the thumb-screw, and also enabling the wearing .away of the parts to be compensated for by simply setting up the centre screws, J3, properly therefor. M3, a l

screw-shaft, screwing into and through a. lug, N3,upon the under side of the lower section, D3, of the frame B3,

extending loosely through the top of the boioportion B of the lathe-rest frame. O3, a handle on outer end 'ofscrewf shaft M3 for convenience in turning it. By turning the-said screwshaft N3 the frame Bais made to move either 'forward-or backward upon the main frame A, according to the direction in which the screw-shaft M3 is turned. On this screw-shaft M3 is a pinion-wheel, Pi', that engages with the loose geabwheel T of the friction-clutch U,

l by means of which, when the said gear-wheel fl is in connection with the iixed wheel S of said clutch, the

forward and backward movement or cross-feed oi' the tool-rest frame can be accomplished thronghthe revolution -of the slotted shaft C2, as is obvious without any further explanation. For .tho purpose of chasing screwthreads the vback or inner end of the lathe-rest 'frame is secured t'o and moves upon a horizontal screw-shaft, Q, extending in the direction of the length of the lathe-bed by means of a. screw-threaded nut or sleeve, R5, divided .in the ldirection of its length into two equal parts, both of which are arranged to slide by their arms, S3, upon the downward projecting piece T? of the lathe-rest, so as to open from or close upon each other; the two parts of the nut R3, when closed `upon ,each other, 'embracing the said screw-shaft Q3 hereinbefore referred to, thereby placing the rest or carriage under. control of said screw-shaft, which in turn is connected to the turning gear lof the lathe inthe usual and well-known manner. The two parts of the nut R3 are both operated by turning a. shaft or spindle U3, having a. handle, V3, which spindle is provided with two cams or eecetrics W3, (one for each part of the said nnt,) so attached to the same as .-tp move one part of the nut upward, whilethe other part moves downward, this arrangement of parts being plainly and distinctly 'shown in iig., 2 of the drawings.

What I claim as 'i w, and desire to secure by Letters Patent, is v 1. The combination of the friction-clutch X, or its equivalent, .with the worm-gears A, connected v together by pinion-wheels B2, slotted shaft C2, and intermediate gear-wheels' W, R, N, and E, with. the Vlatter engaging with the toothed or geared rack-bar K of the lathe-bed, when all combined and arrangedftogcther so as to oper-utc substantially in-the manner and for the purpose' described. l A

2. In combination with the above, the friction-clutch U, or its equivalent, connected through its loose gearwheel T with the pinion-wheel. P3 of a screw-shaft, MS, screwing into'and'throilghthe lug Na of the sliding latherest frame A3, substantially asidescribed for the purpose speciied.

3. The combination of the divided nuts I3, L3, and thumb-screw, H3, with thetwo sections G3 and D3 of the' tool-rest frame A?, substantially as and for the purpose described.

HENRY K. SMITH. Witnesses:

Gino. L. CLARK, F. IA.. SMITH. 

